# External laser sources

Part ID: 3.08a · Layer 3 (Networking & interconnect) · child of 3.08

Laser sources supplied externally to co-packaged optics designs rather than integrated on the photonic chip itself.

## Companies

| Company | Role | Confidence | Ownership | Ticker | Note |
|---|---|---|---|---|---|
| Coherent | manufacturer | inferred | public | COHR |  |
| Lumentum | manufacturer | inferred | public | LITE |  |

Confidence tags: disclosed = company/filing statement; reported = trade press or partner list; inferred = taxonomy lead.